Electric vehicle having swing arm with motor

摘要

Provided is an electric vehicle that is easy to start to move even when there is load applied, and which does not generate rotational resistance of the electric motor when the vehicle is push-walked. A connection/disconnection mechanism is provided between the electric motor (50) and the speed reducing mechanism (70) to switch transmission of the rotating driving force from a disabled state to an enabled state when the electric motor (50) rotates at a predetermined rotation speed or more. The connection/disconnection mechanism is a centrifugal clutch (40). The swing arm (12) is configured as a cantilever-type, supported only at the left side in the vehicle width direction, so that the centrifugal clutch (40), the electric motor (50), and the speed reducing mechanism (70) are arranged in this order, from the left side in the vehicle width direction.

主权项

1. An electric vehicle comprising:
a swing arm (12) which is swingably journaled to a vehicle body frame and rotatably journals a rear wheel (WR); an electric motor (50) which is disposed inside said swing arm (12) to overlap said rear wheel (WR) in a side view of the vehicle body and supplies a rotational driving force to the rear wheel (WR); a disconnection/connection mechanism (40) which is provided on a transmission mechanism transmitting the rotational driving force from said electric motor (50) to said rear wheel (WR) to disable transmission of the rotational driving force until said electric motor (50) rotates at a predetermined revolution or more when the vehicle starts to move; wherein said disconnection/connection mechanism (40) is provided outside of said rear wheel (WR) in the width direction of the vehicle and outside of said electric motor (50) in the width direction of the vehicle; wherein the rotational driving force of said electric motor (50) is transmitted to a speed reducing mechanism (70) through said disconnection/connection mechanism (40), and is transmitted from said speed reducing mechanism (70) to said rear wheel (WR); wherein a wheel (56) of said rear wheel (WR) has a recess-like space inside in the radial direction of a rim of said wheel; wherein said speed reducing mechanism (70) is provided to be configured to be put within the recess-like space of said wheel (56); and wherein said electric motor (50) is provided to be configured to overlap the rim of said wheel (56) of said rear wheel (WR) in a side view of the vehicle body.